“Right now, we know with some certainty that he was alive around 10 a.m. Saturday,” Allegheny County Police Lt. Andrew Schurman told Channel 4 Action News on Tuesday.

Police said robbery may be a motive, but investigators were exploring other motives.

“Right now, robbery is definitely one of the motives we’re looking at. It does not appear there was forced entry on the apartment,” said Schurman.

Dent was known as an activist in the community who fought for safer streets. One resident, who did not want to be identified, said Dent helped homeless people find housing and worked with kids at the community center.